JP2003317360A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device in which excellent recording and reproducing characteristics of an optical disk are obtained. <P>SOLUTION: A disk device 1 has a device main body 2 equipped with a casing 22 and a top plate (lid) 23 for covering an upper portion of the casing 22 and a disk tray 11 having a disk housing part 111 for housing an optical disk D and installed movably to the device main body 2 through an opening 240 formed on a front face of the device main body 2 and on the top plate 23, a projection 231 formed to gradually decrease a cross-sectional area toward the top is provided within an area which corresponds to the disk housing part 111 when the disk tray 11 is inserted into the device main body 2 to be protruded towards the inside of the device main body 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device.

[0002]

2. Description of the Related Art As a disk device for reproducing or recording / reproducing an optical disk such as a CD-ROM, a CD-R, a DVD, etc., an optical disk is stored in a recess on a disk tray placed substantially horizontally and in a horizontally placed state. In addition to the above-mentioned use, there is known a vertical / horizontal type that can be used in a vertically placed state in which the disc tray is vertical.

FIG. 11 is a plan view showing a conventional optical disk device which can be used in a vertically placed state, and FIG. 12 is a partial cross-sectional side view of the optical disk device shown in FIG. 11 (state in which a disk tray is moved to a discharge position). ), FIG. 13 is a partial cross-sectional side view showing another configuration example of the conventional optical disk device.

As shown in FIG. 11, a conventional disk device 900 that can be used even in this vertically installed state is a disk device unit (not shown) including an optical pickup device and the like.
Device main body 920 installed inside, and this device main body 9
20 has a disc tray 910 that is movable between a position for loading the optical disc D (loading position) and a position for ejecting the optical disc D (ejection position).

The apparatus main body 920 includes a housing 922 and a lid 9
23 and a front bezel 940 provided on the front side, and an opening 941 is formed in the front bezel 940. Through this opening 941, the disc tray 91
Zeros are moved in and out of the eject position and the load position.

The disc tray 910 has an optical disc D on it.
A concave disk storage portion 911 for storing the disk is formed, and a plurality of claw portions 913 are provided around the disk storage portion 911 so as to project toward the disk storage portion 911. The claw portion 913 is used in the conventional disk device 9
00 is used to hold the optical disc D in a loosely fitted state from the out-of-plane direction when used in a vertically placed state.

If such a claw portion 913 is provided on the disc tray 910, when the optical disc D is stored in the disc storage portion 911, a part of the optical disc D is erroneously placed on the claw portion 913. When the disc tray 910 has been placed (see FIG. 11) and moved to the loading position, the optical disc D is tilted with respect to the disc storage portion 911 (a part of the optical disc D is in the disc storage portion 911).
It is conveyed to the inside of the apparatus main body 920 in a state of being projected from. Then, in this case, even if the disc tray 910 is moved to the ejection position, the optical disc D is opened by the opening 94.
It cannot be moved by being caught near 1 (upper rear end of the front bezel 940) (see FIG. 12).

Therefore, when providing such a claw portion 913, conventionally, as shown in FIG. 13, a rectangular parallelepiped convex portion 930 is provided in the vicinity of the opening 941 of the lid 923. When the convex portion 930 is provided, even when the disc tray 910 is moved to the loading position with a part of the optical disc D placed on the claw portion 913, the convex portion 930 discs the optical disc D. Storage 911
Since the optical disc D and the claw portion 913 can be bent toward the bottom surface side of the disc storage portion 911 by pushing toward the optical disc D, the optical disc D is caught near the opening 941 when the disc tray 910 is moved to the ejection position. And the disc tray 910 can be moved to the eject position.

However, when the rectangular parallelepiped convex portion 930 is provided on the lid 923, the air flow (air flow) generated when the optical disc D rotates (high speed rotation),
A sudden change occurs in the vicinity of the convex portion 930, and the optical disc D is directed toward the disc storage portion 911 (downward in FIG. 13).
I will press it. As a result, the recording surface of the optical disc D is displaced from the focus position of the laser light from the optical pickup,
It adversely affects the recording / reproducing characteristics. Furthermore, when the spindle motor for rotating the optical disc D reaches a specific number of revolutions, the phenomenon that the optical disc D resonates with the vibration of the spindle motor can be seen. In this case, when the downward force as described above is applied to the optical disc D, the inclination of the optical disc D becomes even larger, and the recording / reproducing characteristics of the optical disc D are greatly impaired.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a disc device which can obtain good recording / reproducing characteristics of an optical disc.

[0011]

The above objects are achieved by the present invention described in (1) to (20) below.

(1) An apparatus main body having a casing and a lid for covering the upper portion of the casing, and a disc storage portion for storing an optical disc, having an opening formed in the front surface of the device main body. A disk tray movably installed with respect to the apparatus body, and the lid body in an area corresponding to the disk storage portion when the disk tray is inserted into the apparatus body, The disk device, wherein a convex portion having a shape whose cross-sectional area gradually decreases toward the tip is provided so as to project toward the inside of the device body.

(2) An apparatus main body having a housing and a lid for covering an upper portion of the housing, and a disk housing portion for housing an optical disk are provided, and through an opening formed on the front surface of the apparatus body. A disk tray movably installed with respect to the apparatus body, and the lid body in an area corresponding to the disk storage portion when the disk tray is inserted into the apparatus body, A disk device, wherein arcuate ridges are provided so as to protrude toward the inside of the device body.

(3) The disk device according to the above (2), wherein the ridge has a shape in which its cross-sectional area gradually decreases toward the tip.

(4) The disk device according to the above (2) or (3), wherein the peripheral surface of the ridge forms an inclined surface.

(5) The disk device according to (4), wherein an angle formed by the peripheral surface of the convex strip and the lid is 100 to 150 °.

(6) The disk device according to any one of the above (2) to (5), wherein the ridge has a flat end surface.

(7) The disc device according to (6), wherein the distance between the tip end surface of the ridge and the bottom face of the disc storage portion is 8 to 10 mm.

(8) The disk device according to any one of the above (2) to (7), wherein the ridge is formed integrally with the lid.

(9) The disk device according to (8), wherein the ridge is formed by pressing or drawing.

(10) In the area, a convex portion having a cross-sectional area gradually decreasing toward the tip is provided so as to project toward the inside of the apparatus main body (2) to (9). ) The disk device according to any one of 1).

(11) The disk device according to the above (10), wherein the height of the protrusion is lower than the height of the protrusion.

(12) The disk device according to the above (10) or (11), wherein a part of the convex portion and the convex line are connected.

(13) The convex portion is provided in the vicinity of the opening of the lid body (1) or (10).
A disk device according to any one of (1) to (12).

(14) The disk device according to (13), wherein the convex portion has a function of restricting the posture of the optical disk.

(15) The disk device according to any one of the above (1) or (10) to (14), wherein the peripheral surface of the convex portion constitutes an inclined surface.

(16) The angle formed by the peripheral surface of the convex portion and the lid body is 110 to 150 °.
The disk device described in 1.

(17) The above-mentioned (1) or (10) to (1), wherein the convex portion has an oval cross-sectional shape.
6. The disk device according to any one of 6).

(18) The disk device according to any one of the above (1) or (10) to (17), wherein the tip portion of the convex portion constitutes a flat surface.

(19) The disk device according to any one of (1) or (10) to (18), wherein the convex portion is formed integrally with the lid.

(20) The disk device according to the above (19), wherein the convex portion is formed by pressing or drawing.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a disk device of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment> First, a first embodiment of the disk device of the present invention will be described.

FIG. 1 is a plan view showing a first embodiment of the disk device of the present invention, FIG. 2 is a plan view of the top plate of the disk device shown in FIG. 1 as seen from the inside of the device body, and FIG.
1 is a plan view showing a state in which a top plate is removed from the disc device shown in FIG. 1, FIGS. 4 and 5 are sectional side views showing the disc device shown in FIG. 1, and FIG. 6 is a diagram showing the disc device shown in FIG. 6 is a plan view showing a state where the optical disc is erroneously stored in the disc tray (erroneous storage state), and FIG.
FIG. 6 is a cross-sectional side view showing a state where the disc tray is being moved from the loading position to the ejection position in the state shown in FIG. In the following, for convenience of description, the upper side in FIGS. 1 to 3 and 6 and the right side in FIGS. 4, 5, and 7 are “rear” or “rear”, FIGS. 1 to 3, and FIG. The lower part of FIG. 6 and the left part of FIGS. 4, 5, and 7 are referred to as “front” or “front”.

The disk device 1 shown in these figures is a music CD, CD-ROM, CD-R, CD-RW, DVD.
Etc. is a device having a function (or a function of recording / reproducing) of reproducing information recorded on an optical disc.

As shown in FIGS. 1 to 5, the disk device 1 mounts (stores) the device main body 2 and the optical disk,
A disc tray 11 that moves in the front-rear direction (horizontal direction) with respect to the device body 2 and a sled mechanical unit (disc device unit) 3 installed in the device body 2 are provided. The configuration of each unit will be described below.

The apparatus main body 2 includes a frame 21 and a casing (housing) 22 that covers a lower portion and side portions of the frame 21.
A top plate (lid) 23 that covers the upper portion of the frame 21 (casing 22), and a front bezel 24 provided in front of
And have.

The front bezel 24 has an opening 24.
0 is formed. That is, the opening 240 is formed on the front surface of the apparatus body 2. The disc tray 11 is movably installed with respect to the apparatus main body 2 through the opening 240.

On the frame 21, the disc tray 11 and its drive mechanism (not shown), the sled mechanical unit 3, the main circuit board 12, etc. are mounted.

A casing 22 is fixed to the frame 21 by screws, for example, and a lower portion of the frame 21 is covered with a bottom plate 221 of the casing 22.

A top plate 23 is provided on the upper portion of the frame 21.
Is fixed by, for example, screws, and a space for housing the disc tray 11 is formed between the frame 21 and the top plate 23.

The frame 21 and the disc tray 11 are each made of a resin material (plastic).

The casing 22 and the top plate 23 are
Each is a plate-shaped member formed by deforming a metal plate in a predetermined manner by press molding or the like, and a top plate 23 is integrally formed with a convex portion 231 to be described later as shown in FIG.

The main circuit board 12 has a disk device 1
A circuit for controlling various operations is formed, and various ICs such as a microprocessor, a memory, and a motor driver, and various electronic parts such as resistors, capacitors, and switches are mounted.

The disc tray 11 has a shallow concave disc storage portion 111, and the optical disc is conveyed while being stored in the disc storage portion 111.

Further, the disc tray 11 has a structure shown in FIG.
As shown in FIG. 4, claw portions 113 are provided at four locations on the outer peripheral portion of the disc storage portion 111. Each of the claws 113 is rotatable (rotatable) about a shaft 114, and when the disc device 1 is used in a vertically installed state, it protrudes into the disc storage portion 111 (see FIG. 1). The state shown in (1) is set, and the stored optical disc is held in a loosely fitted state from the out-of-plane direction so as not to drop from the disc storage portion 111.

Each of these claw portions 113 is made of a flexible material such as a resin material.

The disc tray 11 is driven by a driving mechanism (not shown) mounted on the frame 21 to open the opening 2
It moves (slides) in the front-back direction with respect to the apparatus main body 2 via 40. That is, the disc tray 11 has the opening 24.
0 between a loading position (hereinafter, also referred to as “loading state”) for loading the optical disk on the apparatus body 2 and a discharging position (hereinafter, also referred to as “unloading state”) for discharging the optical disk. It is movable.

At the loading position (the state shown in FIG. 5), the disc tray 11 is wholly contained in the main body of the apparatus, and at the ejection position (the state shown in FIGS. 1, 3 and 4). Most of them are discharged (projected) to the front side of the apparatus main body 2.

As shown in FIGS. 3 to 5, the apparatus main body 2
A frame member 13 that supports the sled mechanical unit 3 is installed inside. The frame member 13 has a substantially rectangular frame shape, and a shaft 131 is formed on both sides of the frame member 13 so as to project therefrom. The shaft 131 is the frame 21
It is rotatably supported by the receiving portion formed on the. As a result, the frame member 13 is rotatable about the shaft 131 with respect to the apparatus body 2.

The frame member 13 is driven by a drive mechanism (not shown) to be in a posture substantially parallel to the top plate 23 and the bottom plate 221 in the loaded state, and the front side thereof is displaced downward in the discharged state so that the top plate 23 and the bottom plate 221 are displaced. It is displaced so as to have an inclined posture with respect to.

Inside the frame member 13, the sled mechanical unit 3 is located. The sled mechanical unit 3 is supported by the frame member 13 via four rubber bushes (elastic members) 14 that absorb vibrations.

The sled mechanical unit 3 mainly includes a chassis (base) 4, an optical disk rotation driving mechanism 5, an optical pickup (optical head) 6 and an optical pickup moving mechanism 7 installed (mounted) on the chassis 4. It is composed of.

The optical disk rotation drive mechanism 5 has a spindle motor 51 and a turntable 52 fixed to the rotor of the spindle motor 51. The optical disk rotation drive mechanism 5 is for mounting (mounting) an optical disk on the turntable 52 and rotating the optical disk.

The optical pickup 6 includes an objective lens 61,
An actuator 62 for driving the objective lens 61 in the optical axis direction (focusing) and the radial direction of the optical disk (tracking), a laser light source, a condensing optical system, a beam splitter (or a half mirror), information detection and focusing. A light receiving element for detecting a signal and a tracking signal, and a supporting member 63 for supporting these are provided, and the reflected light of the laser light emitted to the recording surface of the optical disc is passed through an objective lens, a beam splitter (or a half mirror), or the like. And leads to the light receiving element.

In the loaded state, the objective lens 61 is exposed in the disc housing portion 111 through the opening 112 formed in the disc tray 11 and faces the recording surface of the optical disc.

The support member 63 is made of a metal material such as that manufactured by die casting. Support member 6
On the left side of FIG. 3 in FIG. 3, a pair of sliding portions 64 having holes through which the guide shaft 76 is inserted are formed. A slide portion 65 that engages with the guide shaft 77 and slides along the guide shaft 77 is formed on the right side of the support member 63 in FIG. 3.

The optical pickup moving mechanism 7 includes a sled motor 71 capable of forward / reverse rotation, a worm 72 fixed to the rotation shaft of the sled motor 71, a large diameter gear 73 meshing with the worm 72, and a large diameter. A small diameter gear 74 that is fixed to the gear 73 and rotates coaxially, a rack gear 75 that is fixed to the support member 63 and meshes with the small diameter gear 74, and a pair of guide shafts that define the movement path of the support member 63 and guide it. It is composed of 76 and 77.

When the sled motor 71 is driven, its rotational force is sequentially transmitted to the worm 72, the large diameter gear 73, the small diameter gear 74 and the rack gear 75, and the support member 63 is guided along the guide shafts 76 and 77 in the radial direction of the optical disk ( It moves in a predetermined movement range in the radial direction. In this case, depending on the rotation direction of the sled motor 71, the support member 63 is
It moves in a direction approaching the rotation center of the optical disk or in a direction moving away from the rotation center.

Chassis 4 (thread mechanical unit 3)
Rotates with respect to the apparatus main body 2 together with the frame member 13. The shaft 131, which is the center of rotation, is at the rear end (one end) of the chassis 4.
Located in the vicinity. That is, the rear end of the chassis 4 serves as the center of rotation and is substantially the same as the main body 2 without any displacement.
The front end (the other end) of the chassis 4 serves as a displacement end 42 that is displaced substantially vertically with respect to the apparatus body 2.

With such a configuration, the chassis 4 (sled mechanical unit 3) is in a position where the displacement end 42 side is raised in the loaded state (hereinafter, simply referred to as “elevated position”) (see FIG. 5), and ejected. In the state, the displacement end 42 side is in a lowered position (hereinafter, simply referred to as a “lowered position”) (FIG. 4).
reference).

The chassis 4 is in a posture substantially parallel to the top plate 23 and the bottom plate 221 in the raised position, and in the lowered position,
The posture is inclined with respect to the top plate 23 and the bottom plate 221.

When the chassis 4 is in the raised position, the turntable 52 comes out of the opening 112 through the disc housing portion 1.
The optical disk loaded in the apparatus main body 2 is mounted (placed) on the turntable 52 by being projected (exposed) into the optical disk 11. In this state, the disc clamper 15 rotatably installed inside the top plate 23 is mounted on the turntable 5
It is attracted to the magnet installed in No. 2 so that the optical disk is sandwiched between the turntable 52 and the disk clamper 15 (see FIG. 5).

When the chassis 4 is in the lowered position, the turntable 52 and a part of the optical head 6 do not interfere with the disc tray 11 which moves to the eject position (see FIG. 4).

As described above, at the ejecting position of the disc tray 11, the optical disc normally accommodated in the disc accommodating portion 111 is conveyed into the apparatus main body 2 by the movement of the disc tray 11 to the loading position, and the turntable is turned on. It is attached to 52.

However, as shown in FIG. 6, for example, a part of the optical disc D is erroneously mistaken for the claw portion 113 of the disc tray 11.
The disc tray 11 is loaded on the disc tray 11 in a loaded state, that is, in a state where the optical disc D is projected from the disc storage portion 111 on the front side of the disc tray 11 (hereinafter, this state is referred to as an “erroneous storage state”). When the optical disc D is moved to the inside of the apparatus main body 2,
The optical disk D cannot be mounted on the turntable 52. Therefore, in this case, it is necessary to move the disc tray 11 to the ejection position and eject the optical disc D from the apparatus main body 2.

In the present invention, as shown in FIGS. 5 and 7, the top plate 23 accommodates the disc when the disc tray 11 is inserted into the apparatus main body 2 (when the disc tray 11 is moved to the loading position). In the area corresponding to the part 111,
A convex portion 231 that protrudes toward the inside of the device body 2 is provided. In the present embodiment, the convex portion 231 is the top plate 23.
Is provided in the above region and near the opening 240. The convex portion 231 has a function of restricting the attitude of the optical disc D, that is, a function of preventing the optical disc D from being caught near the opening 240 (upper rear end of the front bezel 24). Therefore, even when the disc tray 11 is moved to the loading position while the optical disc D is erroneously stored (erroneously attached state), when the disc tray 11 is moved toward the ejection position, the upper rear side of the front bezel 24 is removed. It is possible to prevent the disk tray 11 from being caught at the end, and it is possible to smoothly move the disc tray 11 to the ejection position.

Specifically, when the disc tray 11 is moved to the loading position in the erroneous storage state (when the optical disc D is erroneously inserted into the main body 2 of the apparatus), the convex portion 231 holds the optical disc D in the disc storage position. The portion protruding from the portion 111 (the left side in FIG. 7) is pressed toward the disc storage portion 111, so that the claw portion 113 and the optical disc D are pushed.
Bend to the bottom side of. As a result, the disc tray 11
When the optical disc D is moved to the ejection position, the optical disc D opens the opening 24.
It is possible to prevent being caught near 0.

The present invention is characterized in that the cross-sectional area of the convex portion 231 has a shape that gradually decreases toward the tip. In this embodiment, the convex portion 231 has the peripheral surface 2 thereof.
32 forms an inclined surface.

Here, tentatively, for example, a convex shape such as a rectangular parallelepiped shape, that is, a shape whose cross-sectional area does not change toward the tip (shape whose peripheral surface is substantially perpendicular to the top plate 23)
When the convex portion of the optical disc D is provided on the top plate 23, an air flow (flow of air) generated when the optical disc D rotates (high speed rotation)
However, it suddenly changes in the vicinity of this convex portion and presses the optical disc D toward the disc storage portion 111 (downward). As a result, the recording surface of the optical disc D deviates from the focus position of the laser light from the optical pickup, and the recording / reproducing characteristics are adversely affected. Furthermore, when the spindle motor 51 for rotationally driving the optical disc D reaches a specific number of rotations, the phenomenon that the vibration of the spindle motor 51 and the optical disc D resonate can be seen. in this case,
When the downward force as described above is applied to the optical disc D,
The inclination of the optical disc D becomes even larger, and the recording / reproducing characteristics of the optical disc D are greatly impaired.

On the other hand, by forming the convex portion 231 into the shape as described above, the air flows along the surface of the convex portion 231, so that the air flow (generated at the time of rotation (high speed rotation) of the optical disc D ( It is possible to suppress (prevent) the abrupt change of the air flow) in the vicinity of the convex portion 231 (the amount of change in the air flow in the vicinity of the convex portion 231 increases). As a result, it is possible to suppress (prevent) the deterioration of the recording / reproducing characteristics of the optical disc D due to the increase in the amount of change in the vicinity of the convex portion 231 of the air flow (turbulence of the air flow).

In this case, the angle between the peripheral surface 232 and the top plate 23 (angle θ1 in FIG. 4) is not particularly limited, but is 1
It is preferably about 10 to 150 °, and 125 to 13 °
It is more preferably about 5 °. By setting the angle θ1 within the above range, the above effect is further improved.

Further, the convex portion 231 has an oval cross section. As a result, the air flows more smoothly along the surface of the convex portion 231.
It is possible to more efficiently suppress (prevent) a rapid change in the air flow (turbulence of the air flow) in the vicinity of 1.

The tip surface 233 of the convex portion 231 constitutes a flat surface, and when the disc tray 11 is moved to the loading position, the tip surface 233 and the bottom surface of the disc storage portion 111 are It is configured to be substantially parallel. By configuring the convex portion 231 with such a structure, the air flows more smoothly along the surface of the convex portion 231, and more efficiently suppresses (prevents) the turbulence of the air flow in the vicinity of the convex portion 231. be able to. Further, the optical disc D in the erroneously stored state slides while the upper surface of the optical disc D is in contact with the convex portion 231 when the disc tray 11 is moved from the loading position to the ejecting position. By setting the
It is possible to reduce the sliding resistance with respect to No. 1 and to prevent the upper surface of the optical disc D from being damaged.

Further, in this embodiment, the convex portion 231 is formed integrally with the top plate 23. Therefore, the number of manufacturing steps and the number of parts of the disk device 1 can be reduced as compared with the case where another member configured of a rubber piece or the like is fixed (fixed) to the top plate 23, and the production of the disk device 1 is reduced. It is possible to improve the sex.

The method of forming such convex portions 231 is not particularly limited, but it is preferable to use press working or drawing. According to such plastic working, the convex portion 231
Can be easily formed.

The shape of the convex portion 231 is not limited to that shown in the figure. For example, the cross-sectional shape of the convex portion 231 may be a polygon such as a triangle, a quadrangle, a rhombus, a hexagon, or a circle.

Further, the convex portion 231 is not limited to one integrally formed with the top plate 23, and for example, another member composed of a rubber piece or the like is fixed (fixed) to the top plate 23 with an adhesive or the like.
It may be one.

<Second Embodiment> Next, a second embodiment of the disk device of the present invention will be described.

FIG. 8 is a plan view of the top plate included in the disk device of the second embodiment as seen from the inside, and FIG. 9 is a sectional side view showing the disk device of the second embodiment.

The disk device of the second embodiment will be described below focusing on the differences from the first embodiment, and the description of the same items will be omitted.

In the disk device 1 of the second embodiment, the top plate 23 is provided with the protrusions 231 and the protrusions 234, and the other points are the same as those in the first embodiment.

That is, the top plate 23 of the second embodiment has
As shown in FIG. 9, when the disc tray 11 is inserted into the apparatus main body 2 (when the disc tray 11 is moved to the loading position), the same as in the first embodiment is provided in the area corresponding to the disc storage portion 111. 231 having the above-mentioned configuration and the projection 234 protruding toward the inside of the arc-shaped device body 2.
And are respectively provided.

Specifically, the ridge 234 is the optical disc D.
It is provided in an arc shape with the center of rotation of the (disk clamper 15) being substantially the center.

The ridge 234 has a function (rectifying action) of adjusting the air flow (air flow) generated when the optical disc D rotates (high speed rotation). In the present embodiment, the ridge 234 is provided. Together with the convex portion 231 constitute a rectifying means (air flow adjusting means).

The height of the protrusion 234 is set lower than the height of the protrusion 231. Thereby, the ridge 234
The function as the rectifying means by the convex portion 231 and the convex portion 231 is suitably exerted.

The ridge 234 has a shape in which its cross-sectional area gradually decreases toward the tip. In this embodiment, the peripheral surface 235 of the ridge 234 forms an inclined surface. By forming the ridge 234 into such a shape,
The airflow generated when the optical disc D rotates (high speed rotation) can be adjusted (controlled) more efficiently. This makes it possible to more reliably suppress (prevent) the deterioration of the recording / reproducing characteristics of the optical disc D due to the turbulence of the air flow.

In this case, the angle between the peripheral surface 235 and the top plate 23 (angle θ2 in FIG. 9) is not particularly limited, but is 1
It is preferably about 00 to 150 °, and 135 to 14
It is more preferably about 5 °. By setting the angle θ2 within the above range, the above effect is further improved.

Further, the front end surface 236 of the ridge 234 constitutes a flat surface, and when the disk tray 11 is moved to the loading position, the front end surface 236 and the bottom surface of the disk storage portion 111 are It is configured to be substantially parallel. With the ridge 234 having such a configuration, the airflow can be adjusted more efficiently.

The distance (the length L in FIG. 9) between the tip end surface 236 of the ridge 234 and the bottom surface of the disc housing portion 111 is not particularly limited, but is preferably about 8 to 10 mm, and 8.5. More preferably, it is about 9.5 mm.
By setting the length L in the above range, the rectifying action by the ridge 234 is particularly effectively exhibited.

Further, in the present embodiment, the ridge 234 is formed integrally with the top plate 23. The ridge 234 and the top plate 2
By integrally molding with 3, the number of manufacturing steps and the number of parts of the disk device 1 can be reduced as compared with the case where another member composed of a rubber piece or the like is fixed (fixed) to the top plate 23. it can. Therefore, the productivity of the disk device 1 can be improved.

The method of forming such a convex strip 234 is not particularly limited, but it is preferable to use pressing or drawing. According to such plastic working, the ridges 234
Can be easily formed.

The cross-sectional shape of the ridge 234 is not limited to that shown in the figure as long as it can adjust the air flow generated when the optical disc D rotates. Also,
The ridges 234 are not connected to each other and may be, for example, a plurality of ridges provided at intervals.

Further, the projection 231 and the projection 234 are not limited to those integrally formed with the top plate 23, and one or both of them may be a separate member composed of, for example, a rubber piece. It may be fixed (fixed) to the plate 23 with an adhesive or the like.

The disk device 1 of the second embodiment can also achieve the same effects as those of the first embodiment.

The convex portion 231 can be omitted if necessary (for example, depending on the type of the disk device 1). That is, in the disk device 1 of the present invention, only the ridge 234 may be provided on the top plate 23.
Even in this case, the ridge 234 preferably exerts the rectifying action as described above.

<Third Embodiment> Next, a third embodiment of the disk apparatus of the present invention will be described.

FIG. 10 is a plan view of the top plate of the disk device according to the third embodiment as viewed from the inside.

Hereinafter, the disk device of the third embodiment will be described focusing on the differences from the first and second embodiments, and the description of the same items will be omitted.

In the disk device 1 of the third embodiment, the convex portions 231 and the convex stripes 234 are partially connected to each other, and the other points are the same as in the second embodiment.

With this arrangement, the area where the ridges 234 are formed can be increased, so that the air flow (air flow) generated when the optical disc D rotates (high speed rotation) can be adjusted (rectified) more reliably. Yes, as a result, optical disc D
It is possible to more reliably prevent the deterioration of the recording / reproducing characteristics.

The disk device 1 of the third embodiment can also obtain the same effects as those of the first and second embodiments.

The disk device of the present invention has been described above with reference to the illustrated embodiment, but the present invention is not limited to this, and each unit constituting the disk device can perform any function similar to the above. It can be replaced with that of the configuration. In addition, any constituent may be added.

Further, in each of the above-described embodiments, the convex portion has been described as having the function of preventing the erroneous insertion of the optical disk, but the convex portion may have other arbitrary functions instead of this, or the erroneous function of the optical disk. It may have two or more functions of the insertion prevention function and other functions. In these cases, the installation position of the convex portion is not limited to the vicinity of the opening of the lid body as long as it is within the area corresponding to the disk storage portion when the disk tray is inserted into the apparatus body.

[0105]

As described above, according to the present invention, it is possible to suppress (prevent) the disturbance of the air flow (air flow) generated when the optical disk rotates (high speed rotation). Further, according to the present invention, this air flow can be adjusted (rectified).

As described above, according to the present invention, it is possible to prevent the recording / reproducing characteristics of the optical disc from being deteriorated.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a disk device of the present invention.

FIG. 2 is a plan view of a top plate of the disc device shown in FIG. 1 viewed from the inside of the device body.

3 is a plan view showing a state in which a top plate of the disk device shown in FIG. 1 is removed.

4 is a cross-sectional side view (discharging state) showing the disc device shown in FIG. 1. FIG.

5 is a cross-sectional side view (loaded state) showing the disc device shown in FIG. 1. FIG.

6 is a plan view showing a state in which an optical disc is erroneously stored in the disc tray of the disc device shown in FIG. 1 (erroneous storage state).

7 is a cross-sectional side view showing a state where the disc tray is being moved from the loading position to the ejection position in the state shown in FIG.

FIG. 8 is a plan view of a top plate included in the disc device according to the second embodiment as viewed from the inside.

FIG. 9 is a sectional side view showing a disk device according to a second embodiment.

FIG. 10 is a plan view of a top plate included in the disc device according to the third embodiment, as viewed from the inside.

FIG. 11 is a plan view showing a conventional optical disc device that can be used in a vertically placed state.

FIG. 12 is a partial cross-sectional side view of the optical disc device shown in FIG. 11 (a state in which the disc tray is moved to the ejection position).
Is.

FIG. 13 is a partial cross-sectional side view showing another configuration example of the conventional optical disc device.

[Explanation of symbols]

1 disk device 11 Disc tray 111 Disk storage 112 openings 113 Claw 114 axis 12 Main circuit board 13 Frame member 131 axis 14 rubber bush 15 Disc clamper 2 device body 21 frames 22 casing 221 bottom plate 23 Top plate 231 convex 232 circumference 233 Tip surface 234 convex stripe 235 circumference 236 Tip surface 24 front bezel 240 openings 3 Thread mechanical unit 4 chassis 41 Rotating end 42 Displacement end 43 chassis body 44 Rubber bush mounting part 45 Spindle motor fixing part 5 Optical disk rotation drive mechanism 51 Spindle motor 52 turntable 6 Optical pickup 61 Objective lens 62 actuator 63 Support member 64, 65 sliding part 7 Optical pickup moving mechanism 71 thread motor 72 Warm 73 Large gear 74 Small diameter gear 75 rack gear 76, 77 Guide shaft 81 Guide shaft height adjustment mechanism 91 Holder member D optical disc 900 Conventional Disk Drive 910 disc tray 911 disk storage 913 claw 920 device 922 housing 923 lid 930 convex 940 front bezel 941 opening

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tsuneo Ueho             1601 Sakai, Atsugi, Kanagawa Mitsumi Electric Co., Ltd.             Company Atsugi Office F term (reference) 5D046 AA04 CB11 EA15 EB04 FA04                       HA08

Claims (20)

[Claims] 1. A device main body having a housing and a lid for covering the upper part of the housing, and a disk storage portion for storing an optical disk, and through an opening formed in the front surface of the device main body. A disc tray that is movably installed with respect to the device body, and the lid body traverses in an area corresponding to the disc storage portion when the disc tray is inserted into the device body. The disk device, wherein a convex portion having a shape in which the area gradually decreases toward the tip is provided so as to project toward the inside of the device body. 2. An apparatus main body having a housing and a lid for covering an upper portion of the housing, and a disk housing portion for housing an optical disk, the opening being formed in a front surface of the apparatus body. A disc tray movably installed with respect to the device body, wherein the lid body has a circle in an area corresponding to the disc storage portion when the disc tray is inserted into the device body. A disk device, wherein arcuate ridges are provided so as to protrude toward the inside of the device body. 3. The disk device according to claim 2, wherein the ridge has a shape in which the cross-sectional area thereof gradually decreases toward the tip. 4. The disk device according to claim 2, wherein the ridge has an inclined surface on its peripheral surface. 5. The disk device according to claim 4, wherein an angle formed by the peripheral surface of the ridge and the lid is 100 to 150 °. 6. The disk device according to claim 2, wherein the ridge has a flat end surface. 7. The disk device according to claim 6, wherein a distance between the tip end surface of the ridge and the bottom surface of the disk storage portion is 8 to 10 mm. 8. The disk device according to claim 2, wherein the ridge is formed integrally with the lid. 9. The disk device according to claim 8, wherein the ridge is formed by pressing or drawing. 10. A convex portion having a shape in which a cross-sectional area is gradually reduced toward a tip is provided in the region so as to project toward an inner side of the apparatus main body. The disk device described in 1. 11. The disk device according to claim 10, wherein the height of the protrusion is lower than the height of the protrusion. 12. The disk device according to claim 10, wherein a part of the protrusion and the protrusion are connected to each other. 13. The disk device according to claim 1, wherein the convex portion is provided in the vicinity of the opening of the lid body. 14. The disk device according to claim 13, wherein the convex portion has a function of restricting a posture of the optical disk. 15. The disk device according to claim 1, wherein a peripheral surface of the convex portion constitutes an inclined surface. 16. The disk device according to claim 15, wherein an angle formed by the peripheral surface of the convex portion and the lid is 110 to 150 °. 17. The disk device according to claim 1, wherein the convex portion has an oval cross section. 18. The disk device according to claim 1, wherein the tip portion of the convex portion constitutes a flat surface. 19. The disk device according to claim 1, wherein the convex portion is formed integrally with the lid body. 20. The disk device according to claim 19, wherein the convex portion is formed by pressing or drawing.